The key to conquer any nation’s people is the language, so make an effort to learn Swedish. Specially if you are a native English speaker. If Karolinska has the kindness to offer you a Swedish course (basic Swedish), take it and attend to it twice a week: in the first 5 weeks it will be a bit of overload, but will keep you busy on the dark night and you will learn some useful sentences and also about the culture (hopefully), while on 1x week you will learn to sparsely and on the third month you will still be on it. Don’t be worried, it is not difficult, and there are demanding words that you should learn, like “Ursäkta”/excuse me, “Förlåt”/sorry, “Förlåt, jag pratar lite svenska/jag pratar inte svenska, kan du pratar engelska?”/sorry, I speak little Swedish, can you speak English?
And, if you by any chance think your future can pass by Sweden,don’t think it is going to be easy if you speak only English. Swedes have a great level of English, but that does not means you don’t make your share of effort.